Stave-sander.



KROHN & F. 1. DAVIS.

STAVE SANDER.

APPLICATIONFILED SEPT.26, I914.

Patented Apr. 20, 1915.

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rroR/vm I'HE NORRIS PETERS 60., PHOTC-LITHO. WASHING roN. a. C.

J. J. KROHN & F. J. DAVIS.

STAVE SANDER.

APPLICATION man SEPT. 26, 1914.

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Patented Apr. 20, 1915.

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A TTOR/VEXS 1H5 NORRIS PETERS CO., PHOTO-LITIIKI. WASHINGTON. D. C,

UNTE sans ra rnnr men.

JULIUS J. KROHN, OF ARCATA, AND FREDERICK J. DAVIS, OF OAKLAND,CALIFORNIA.

STAVE-SANDER.

Application filed. September 26, 1914.

To all whom it may concern:

Be itknown that we, JULIUs J..Knon1v and FREDERICK J. DAVIS, citizens ofthe United States, residing, the said Knorm at Arcata, in the county ofHumboldt and State of California, and the said DAVIS at Oakland, countyof Alameda, State of California, have invented certain new and usefulImprovements in Stave- Sanders, of which the following is aspecification.

The present invention relates to improvements in stave sanders, and moreparticularly to a type of device adapted for the sanding of straight orbilge sawed staves.

The invention has for its principal objects to provide a machine capableof adjustment to accommodate straight staves or staves having variousbilges; to construct one having a feeding mechanism for the staves whichmoves the staves relative to the sanding mechanism and maintains thesame in contact therewith at all times, and to provide one which issimple in construction, may be manufactured at little cost, and which isthoroughly eihcient for the purposes described.

iVith the above mentioned and other objects in view, the inventionconsists in the novel construction and combination of parts hereinafterdescribed, illustrated in the accompanying drawings and pointed out inthe claims hereto appended; it being understood that various changes inthe form, proportion, size and minor details of construction within thescope of the appended claims may be resorted to without departing fromthe spirit or sacrificing any of the advantages of the invention.

To more fully comprehend the invention, reference is directed to theaccompanying sheets of drawings, wherein is disclosed one form of ourinvention and in which Figure 1 is a view in side elevation of ourinvention disclosing the feed rollers adjusted to accommodate a bilgestave. Fig. 2 is a top plan view. Fig. 3 is a view in end elevation.Fig. i is a View in detail of the arrangement of the gears for drivingthe feed roller shafts. Fig. 5 is a sectional View taken on line 55 ofFig. 2.

Referring more particularly to the drawings wherein like characters ofreference designate corresponding parts throughout the several views,the numerals 1 indicate suitable frame side members supported by thebase A and formed centrally with the Specification of Letters Patent.

Patented Apr. 26, 1915.

Serial No. 863,697.

standing arms 1 formed with curved slots 5 are also provided at each endof the side frame members 1.

Suitable rotatable shafts 6 and 7 extend through the raised portion 2 ofthe side frame members 1, and pivotally mounted on said shafts adjacentthe side framemembers are the substantially L-shaped hangers, eachformed with an upstanding arm 8 and an outwardly extended arm 9. Thearms 9 carry at their ends suitable locking bolts 10 which operate inthe curved slots 5 and are adapted for maintaining the hangers in theiradjusted position, and the upper ends of said upstanding arms 8 areconnected by pivoted links 11 to the opposite ends of arms 12 carried atthe ends of a shaft 13 journaled in brackets 14 carried by the sideframe members. A yoked arm 15 extends angularly from the shaft 13 andsaid yoke pivotally mounts between the arms 16 thereof a collar 16through which extends the upper end of a threaded shaft 17 pivotallymounted at its lower end on an arm 18 carried by the housing 19 of theshaft 6. Nuts .20 are carried by the threaded end of shaft 17 and arepositioned one on either side of the collar 16 so that the raising orlowering of the nuts on the shaft will cause the hangers through theirconnections with the shaft 13 to be simultaneously raised or lowered attheir outer ends.

Rotatably mounted in tubular housings 21 secured at their opposite endsbetween opposite side frame members 1 are shafts 22 and 23 and clampedrespectively on the housing 19 of shaft 6 and housing 2 1 of shaft 7 arethe arms 25 and 26, which carry at their outer ends the tubular housings27 and 28, in which are. rotatably mounted the shafts 29 and 30, whichare normally positioned directly above the coacting shafts 22 and 23.

Suitable arms 31 and 32 are pivotally mounted at their inner ends aboutthe shaft 13 and carry at their outer ends the tubular 7 position torest on the rolls 37 other rolls 38 which are keyed to rotate therewithand which have convex facesas in Figs. 2 and 3 of the drawings.

The shaft 7 carries on its end a sprocket 39 over which operates a chain40, driven in the direction of the arrow by a smaller sprocket 41carried by a shaft 42 which has a bevel gear 43 which meshes with abevel pinion44-carried by one end of a shaft 45 of an electric motor 46.The shaft 7 also carries a gear 47 which intermeshes with a I ing theshafts in geared relation as described,

and driving thechain in the direction of the arrow, it will be apparentthat the rolls will be driven in the direction of the arrows- Fig. 1,and staves inserted between the rollers on shafts 22 and 29 will bedrawn inwardly and passed between the remaining pairs of rolls untilfinally discharged from the machine from between the rolls carried bythe shafts 23 and 30 which are not positively driven.

7 By adjusting the nuts 20 on the shaft 17 the ends of the hangers willbe raised or lowered which-will also raise or lower the rolls carried byshafts 22 and 23, and the rolls carried .by the arms 25 and 26 will becorrespondingly raised or lowered, owing to the fact that they rest onthe rolls carried by the shafts 22 and '23. It willbe apparent that thehangers may be adjusted to permit the machine to accommodate'straightstaves or those of the bilge type.

Positioned beneath the recess 3 of the side member '1 adjacent which ispositioned the feed rollers, is a supporting standard formed with avertical arm 56 and a horizontal arm 57, and slidably mounted on thevertical arm 56 through the bolts 58 which slide in slots 59 therein, isa shaft hanger 60 formed at its lower end with a lug 61 through whichextends an adjusting screw 62 carried by the arm 57. A band wheel 63 isrotatably mounted on the upper end of the shaft hanger 60 and extendsupwardly in the recess 3 of the side member 1 carrying the rollers, andsaid band wheel is capable of adj ustment so that the peripheral edgethereof will be in a plane approximately level with the upper surface ofthe lower central rolls and rotates on an axis at'right angles to theaxis of rotation of said rolls. A suitable sand belt 64 operatesover theband wheel 63 and extends around an idler wheel 65, adjustably supportedby bolts 66 on a base 67, and also extends around a power band wheel 68carried by the shaft 45 of the motor 46.

In operation the hangers are adjusted to position the rolls 37 and 38 toaccommodate either a straight or bulge sawed stave and as the staves arefed between the pairs of rollers at one end in any suitable manner, therotation of the rolls will draw the staves inwardly and as the stavespass over the sanding belt 64, the inner surface thereof will be rapidlyand eliiciently smoothed.

Having thus described our invention what we claim and desire to protectby Letters Patent is 1. A stave sanding machine of the class described,comprising a succession of pairs of cooperating feed rolls, each pairlying in parallel spaced relation in a substantially horizontal plane tothe other pairs of rolls and between the rolls of which the staves areadapted to pass, means for rotating said rolls, and a sanding devicemovable in a path transversely of the path of movement of the staveswhen propelled between said rolls and adapted to coiiperate with saidstaves when the same are passing between said rolls.

2. A stave sanding machine comprising a succession of pairs ofcooperating feed rolls and between which the staves are adapted to pass,means for rotating said rolls, means for adjusting the end pairs ofrolls in a vertical plane relative to the other pairs of rolls, and asanding device operating across the path of said staves while passingbetween said 7 rolls.

3. A stave sanding machine comprising a plurality of cooperating feedrolls arranged in pairs and between which the staves are adapted topass, means for rotating said rolls, means for simultaneously adjustingcertain pairs of rolls relative to the other pairs of rolls, and asanding device adapted to coeperate with said staves while passingbetween certain of said rolls.

4. A stave sanding machine comprising a succession of pairs of parallelspaced cooperating feed rolls arranged in a substantially horizontalplane and between the rolls of which the staves are adapted to pass,means for rotating the rolls in the same direction, a supporting wheeladjustably positioned between certain pairs of rolls and rotatable in apath at substantially right angles to the path of rotation of saidrolls, and an endless sanding device carried by said wheel forcooperating with the staves while propelled between said pairs of rolls.

5. A stave sanding machine comprising a plurality of rotatably mountedalined rolls arranged in spaced relation to each other and formed withconvex surfaces, a rotatably mounted roll positioned above each of saidfirst mentioned rolls and adapted to rest thereon, and each formed witha concave surface and between which and said first mentioned rolls thestaves are adapted to pass, means for rotating said rolls, and a sandingdevice for cooperating with the staves while propelled by said rolls.

6. In a stave sanding machine comprising a plurality of rotatablymounted lower rolls arranged in a horizontal plane and in parallelspaced relation to each other, a rotatably mounted upper roll positionedabove each of said first mentioned rolls and each carried by pivotedsupports and adapted to rest on said first mentioned rolls and betweenwhich and said first mentioned rolls the staves are adapted to pass,said upper and lower rolls forming a succession of pairs of rolls, meansfor adjusting the plane of the end pairs of rolls relative to the planeof the other pairs of rolls; means for rotating said rolls, and asanding device cooperating with the staves as carried by said rolls.

7. A stave sanding machine comprising a pair of rotatably mountedstationarily supported center rolls and a pair of rotatably mountedadjustably supported end rolls arranged in spaced relation to eachother, a rotatably mounted pivotally supported roll positioned aboveeach of said rolls and adapted to rest thereon and between which andsaid first mentioned pairs of rolls the staves are adapted to pass,means for simultaneously adjusting said end rolls relative to saidstationary rolls, means for rotating said rolls, and a sanding deviceoperating between said spaced stationary rolls for cooperating with thestaves as carried by said rolls.

8. A stave sanding machine comprising a supporting frame, hangerspivotally mounted thereon and free to swing at their outer ends, a pairof spaced rotatably mounted center rolls carried at one side of saidframe, a rotatably mounted end roll carried by each of said hangers atone side of said frame, a rotatably mounted pivotally supported rollpositioned above each of said rolls and adapted to rest thereon, andbetween which and said first mentioned rolls the staves are adapted topass, means for simultaneously adjusting said hangers, a sanding beltoperating between said center rolls for operating on the staves ascarried thereby, and means for operating said belt and for rotating saidrolls.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JULIUS J. KROHN. lVitnesses:

T. A. GRooM, M. SWEET.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FREDERICK J. DAVIS.

WVitnesses:

HARRY A. To'r'rEN, D. B. RICHARDS.

topics of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. G.

